Abstract: A method for targeted market testing and promotion of a media recording for an media recording distribution entity is provided using a computer program plug-in and collecting information related to a playing media recording. Based upon the collected information, playing media recording preferences are stored and cross-referencing the in a user preference database. Computer users having a preference associated with the media recording are identified by analyzing the user preference database. Selected media recording are distributed to the identified users for playing. User reactions to the selected media recording are gathered, both actively and passively. The gathered user reaction information is analyzed and reported on.

Abstract: The present invention teaches a method for creating a media identifier by reading media comprising tracks and a table of contents, the table of contents comprising a beginning track offset for each of the tracks. A bitmap is calculated comprising a series of bits, each bit representing the results of each pair-wise comparison of lengths of a pair of tracks recorded on the media. The media can be an audio CD having pairs of adjacent tracks. A one-bit in the bitmap can indicate that a length of a current track is longer than a length of an associated track and a zero-bit in the bitmap indicates that the length of the current track is shorter than or equal to the length of the associated track.